package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dao.OrdersDao;
import com.itheima.reggie.pojo.*;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersDao, Orders> implements IOrdersService {

    @Autowired
    IShoppingCartService shoppingCartService;

    @Autowired
    IUserService userService;

    @Autowired
    IAddressBookService addressBookService;

    @Autowired
    IOrderDetailService orderDetailService;

    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询用户相应购物车的数据
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> cartList = shoppingCartService.list(lqw);
        boolean b = false;

        if (cartList == null || cartList.size() == 0) {
            throw new CustomException("购物车为空，不支持下单");
        }

        //查询用户信息
        User user = userService.getById(userId);

        //地址信息
        Long addressBookId = orders.getAddressBookId();
        //地址对象
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new CustomException("地址信息有误，不能下单");
        }

        //订单号生成
        long orderId = IdWorker.getId();
        AtomicInteger amount = new AtomicInteger(0);

        //组装订单明细信息
        List<OrderDetail> orderDetailList = cartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //组装订单数据
        //orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //插入订单表
        b = this.save(orders);

        //订单明细表插入
        b = orderDetailService.saveBatch(orderDetailList);

        //购物车清空
        if (b) {
            shoppingCartService.remove(lqw);
        }
    }
}
